Hollow-core fiber based linear cavity ring-down spectroscopy for gaseous oxygen detection

Dorit Munzke; Michael Böhm; Oliver Reich

doi:10.1117/12.2059485

2 June 2014 Hollow-core fiber based linear cavity ring-down spectroscopy for gaseous oxygen detection

Dorit Munzke, Michael Böhm, Oliver Reich

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915789 (2014) https://doi.org/10.1117/12.2059485
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We present a spectroscopic technique that combines the benefits of cavity ring-down spectroscopy and a hollowcore photonic crystal fiber. The 10m fiber is placed inside an optical cavity and acts both as the sample cell (volume = 442 nL) and as a waveguide. Due to the high reflectivity of the cavity mirrors and rather small coupling losses, the effective optical path length can be increased up to 70m. Therefore, as a figure of merit the volume per optical interaction path length is calculated to 6.3 nL m⁻¹. Oxygen detection is performed at 760 nm while scanning across an absorption line. The optical loss due to sample absorption is determined by measuring the ring-down time of light traveling inside the cavity. Results are compared to HITRAN database showing a discrepancy of only 2.5% of the absorption coefficient. This method is of interest for applications that require sensitive measurements on sample volumes of few nanoliters to microliters without the need of calibration.

Citation Download Citation

Dorit Munzke, Michael Böhm, and Oliver Reich "Hollow-core fiber based linear cavity ring-down spectroscopy for gaseous oxygen detection", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915789 (2 June 2014); https://doi.org/10.1117/12.2059485

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available